Typewriting machine



March 2 1926. 1,574,881

u v w G. G. GOING 'IYPEWRITING MACHINE Filed Jan. 10 1924 INVENTOR BY J1W w ymrwm ATTQRNEY Patented Mar. 2, 1926.

UNITED STATES 1,574,881 PATENT ounce.

GEORGE GOULD GOING, OF MIDDLETOWN, CONNECTICUT, ASSIGNOR, BY MESNE AS-SIGNMENTS, TO REMINGTON-NOISELESS TYPEWRITER CORPORATION, A CORPORA-TION OF NEW YORK.

rrrnwnrrmo MACHINE.

K Application filed January 10, 1924. Serial No. 685,848.

To all whom/it may concern:

Be it known that I, Gnonon GOULD GOING,

a. citizen of the United States, residing at Middletown, in the countyof Middlesex and State of Connecticut, have invented certain new anduseful Improvements in Typewriting Machines, of which the following is afull, clear, and exact description, such as will enable others skilledin the art to which it a pertains to make and use the same. T 1sinvention relates to typewriting machines and with regard to certainmore specific features thereof, to mechanisms associated with the keylevers for operating the type bars. y

The object of the invention generally stated is to provide mechanism,which is efficient, economical and readily manufactured, adapted forassociating with typewriter key levers to give the type barsarectilinear motionupon the operation of the key levers.

Another object of the invention is to provide type bar actuatingmechanisms capable of directly engaging with the type bars andfunctionally adapted to carry out the printing substantially withoutnoise.

Other objects of the invention will be in part obvious and will in partappear hereinafter. i

The invention accordingly comprises the features of construction,combinations of elements, and arrangement of parts, which will beexemplified in the construction hereinafter set forth and the scope ofthe ap lication of which-will be indicated in the c aims.

For a fuller understanding of the nature and objects of the inventionreference should be had to the following detailed description taken inconnection with the accompanying drawing, in which:

Figure 1 is a side elevation showing, in

normal position, such parts of the 'mechw. n1sm as are necessary tounderstand one em? bodiment or application of the present invention; and

. Fig. 2 is a side elevation of the mechanism showing the position ofthe members after operation.

Referring to the drawing, 10 indicates a frame, carrying a base plate11, a top plate 12. and a bracket 13. The type bar 14 carrying typecharacters 33 is horizontally disposed on the members 11, 12, and 13 sothat it is capable of executing rectilinear motion. The movement of thetype bar in a forward or printing direction is limited by the platenroller 15 disposed on the frame 10. Movably mounted on the frame, andlimited in movement by the resilient stops 17 and 18, is a key lever 16for operating the type bar 14, and the actuating mechanism therefor, tobe described hereinafter, which is adapted for transmit-ting the motionto the type bar with a negative acceleration.

- Fixed to the type bar 14 by suitable means, such as pins 21, 1s a rack19. This rack is adapted to receive the motion which actuates the typebar. The motion is communicated from the actuating mechanism whichpreferably is in substantially rolling contact therewith.

The actuating mechanism, as illustrated, includes the toothed member orsector 24, pivotally and eccentrically mounted on shaft or pivot 23,which is carried by bracket 13. The sector 24 is shaped to have agradually decreasing radius from the front portion 25 to the rearportion 26. The front portion .25 is adapted to mesh with the curvedportion 20 of the rack 19 while the rear portion 26 is made straight andextends at substantially right angles to the shortest radius of thesector adapting it for meshing with thev straight portion 22 .of therack.-In const-ructing the sector the portion 26 is so disposed that itmeshes with the straight por tion of the rack when the latter reachesits forward position.

Formed integral with the sector is a momentum accumulator or inertiadevice. 27 having a radius approximately equal to the radius of theforward portion 25 of the pinion sector. It is not necessary toconstruct the momentum accumulator 27 with such a radiusbut such aconstruction suitsthe typewriter assemblage.

The link 28 connects the key lever 16 to i the inion sector 24 engagingthe sector at a po nt 29. The point 29 lies forward of a vertical linethrough the axis of the shaft 23 when the parts of the mechanism are intheir normal positions as shown in Fig. 1. By locating the point ofengagement of the link 28 and sector 24 as near as permissible in viewof other constructional features, to a horizontal line through the axisof the shaft 23 and at right angles to the initial'line of action of thelink 28 the initial movement of the sector is facilitated.

In order to provide for the return of the sector 24, and consequentlythe other parts of the mechanism to their normal positions afteroperation, a spring 30 is connected between apost 31, carried by themember 13, and the sector 24. As shown in Fig. 1 the point 32 at whichthe spring 30 is connected to the sector 24 lies near the line extendingbetween post 31 and the axis of the shaft 23. The spring 30 is aided inthe return of the parts to their normal positions by a spring 34 mountedon the frame 10 so that it contacts with the key lever 16 and isenergized by the downward movement of the latter.

The operation of the mechanism is as follows:

The parts of the mechanism are retained in their normal positions shownin Fig. 1 by the action of the spring 30. The type bar actuatingmechanism including the sector 24 and the rack 19 is set in operation 25by means of the key lever 16. Upon the pressing. downward of the keylever 16, mo-

tion is imparted through the link 28 to the sector 24 rotating thelatter forward about the shaft 23. Since the sector 24 meshes 30 withthe rack 19, the type bar 14 is set in motion. As above set forth, andas shown in the drawings, the sector 24 is of gradually decreasingradius from the front portion 25 to the rear portion 26. Come uently asthe'pinion sector rotates, its point of contact with the rack 19gradually approaches the axis of the shaft 23 thus giving the type bar aprinting movement havmg a negative acceleration. The sector 24 and the'rack 19 are also adapted for giving the type bar a rectilinear motion.

After the sector 24 has been given a small angular movement by theoperation of the hey lever 16, the momentum accumulator or inertiadevice 27 which has stored up a certain amount of energy is carried to aposition where a line through the axis of the shaft 23 and the center ofgravity of the device 27 lies near the horizontal. In this position themoment of the accumulator due to the influence of gravity, reaches itsmaximum. The accumulator or inertia device will, there fore, first aidin the completion of the printing movement of the type bar and thenimpart through the sector and rack, a printing impulse. As the type barmoves forward its speed gradually decreases until it reaches itsprinting position. Consequently the type bar is not projected againstthe platen at a high rate of speed but moves slowly and noiselessly intoits printing position which it reaches when the straight portions of therack 19 and sector 24 mesh. The rinting impulse or pressure is thenapplied a on the line of movement of the type bar. fter the printingstroke has been 06m leted the spring 30, tensioned b the operatlon ofthe movmg parts, acts a ong a line nearly at right angles to a lineextending through the axis of the shaft 23 and the point 32 at which thespring is connected to the sector 24. This. action of the spring 30aided by the action ofspring 34 returns the members of the mechapism totheir normal positions, shown in From the above description, it will beseen that the present invention embodies a simple and practicaloperating mechanism, permitting rapid and efficient operation of themachine, and is fully designed to accomplish among others, all of theobjects and advantages set forth above.

Since certain changes may be made in the ments of the invention could bemade without departing from the scope thereof, it is intended that allmatter contained in the above description or shown in the accompanyingdrawing shall be interpreted as illustrative and not in a limitingsense.

Having described my invention what I claim as new and desire to secureby Letters Patent is:

1. In a typewriting machine, in combination, a platen, a type baradapted to approach the platen rectilinearly, actuating means therefor,including a key lever and a pivoted member arranged-to makesubstantially rolling contact with said type bar and impart motionthereto which has a negative acceleration duringthe final stage, and aninertia device for imparting a pressure printing impulse to said typebar at the end of said final stage.

2. In a typewriting machine, in combination, a platen, a type baradapted to approach the platen rectilinearly, and actuating meanstherefor, including a key lever and a pivoted member arranged to makesubstantially rolling contact with said type bar, and impart motionthereto which has a negative acceloration during the final stage, saidpivoted member having a portion adapted by its inertia to impart apressure printing impulse to said type bar at the end of said finalstage.

3. In a typewriting machine, in combination, a platen, a type oar havinga rack and adapted to approach the platen rectilinearly, and actuatingmeans therefor, including akey lever and a toothed m'ember arranged,above construction and different embodito mesh said rack and impartmotion to the type bar which has a. negative acceleration said rack andtoothed ember being one having a negative charac ibristic for theacceleration imparted. 1

5. In a typewriting machine, in combination, a platen, a type bar havinga rack and adapted to approach the platen rectilinearly and actuatingmeans therefor, including a key lever and a toothed member adapted tomesh said rack, the locus of contact between said rack and toothedmember being one having a n egative charactertistic for the accelerationimparted, and an inertia element arranged to impart a pressure printingimpulse to the type bar at the end of its approach to the platen.

6. In a typewriting machine, in combination, a platen, a type bar havinga rack and adapted to approach the platen rectilinearly, and actuatingmeans therefor, including a key lever and a toothed membhr arranged tomesh said rack and impart motion to the type bar which has-a negativeacceleration during the final stage, said toothed member having aweighted portion adapted to impart a pressure printing impulse to thetype bar at the end of said final stage.

7 In a typewriting machine, in combination, a platen, a type bar havinga rack and adapted to approach the platen rectilinearly and actuatingmeans tlierefor, including a key lever and a toothed member adapted tomesh said rack, the locus of contact between said rack and said toothedmember being substantiall a spiral having a decreasing radius as thetype bar approaches the platen.

8. In a typewriting machine, in combination, a platen, a ty e bar havinga rack and adapted to approac the platen rectilinearly and actuatingmeans therefor, including a key lever and a toothed member adapted tomesh said rack, the locus of contact between said type bar and saidtoothed member being substantiall a spiral having a decreasing-radius ast e't pe bar approaches said platen, and also a nal straight portion.

9. In a typewriting machine, in combination, a platen, a ty e bar havinga rack and adapted to approac the platen rectilinearly and actuatingmeans therefor, including a key lever and a toothtfi member adapted tomesh said rack, the locus of contact between said type bar and saidtoothed mem her being substantially a spiral having a decreasing radiusas the type bar approaches said platen, and also a final straightportion, and an inertia device for imparting a pressure printing impulseto said type bar when the flat portion of said type bar and toothedmember engage.

10. In a typewriting machine, in combination, a platen, a type barhaving a rack and adapted to approach the platen rectilmearly, andactuatin means therefor, includin a key lever an a toothed memberadapted to mesh said rack, the locus of contact between said type barand said toothed member being substantiall a spiral having a decreasingradius as tie type bar approaches said platen, and also a final straightportion, said toothed member having a weighted portion adapted to imparta pressure printing impulse to said type bar when the fiat portions ofsaid type bar and toothed member are in engagement.

11. In a typewriting machine, in combination, a platen, a type baradapted to approach the platen rectilinearly and provided with a curvedtoothed rack, a pivoted toothed member adapted to engage with said rackhaving a spiral locus of contact of decreasing radius as the, platen isaproached, a key lever, and operating connections between said key leverand said toothed' member.

12. In a typewriting machine, in combination, a platen, a type baradapted to approach the platen rectilinearly and provide with a curvedtoothed rack, a pivoted toothed member adapted to engage with said rackhaving a spiral locus of contact of decreasing radius as the platen isapproached, akey levervand operating connections between said key leverand said.

toothed member, said rack and toothed member being provided with a flatportion adapted to engage at the final stage of its approach to theplaten.

13. In a typewriting machine, in combination, a platen, a typebaradapted to approach the platen rectilinearly and provided with acurved toothed rack, a pivoted toothed member adapted to engage withsaid rack having a spiral locus of contact of decreasing radius as theplaten is approached, a key lever and operating connections between saidkey lever and said toothed member said rack and toothed member beingprovided with a fiat portion adapted to engage at the final stage of itsapproach to the platen, and an inertia device for imparting the pressureprinting impulse to the type bar when said fiat portions engage.

14. In a typewriting machine, in combination, a platen, a type baradapted to approach the platen rectilinearly and provided with a curvedtoothed rack, a pivoted toothed member adapted to engage with said rackhaving a spirallocus of contact of decreasing radius as the platen isapproached, A

a key lever and operating connections between said key lever and saidtoothed member, said rack and toothed member being provided with a flatportion adapted to engage at the final stage of its approach to theplaten, said toothed member having a weighted portion adapted to imparta pressure printing impulse to said type bar when said flat portionsengage.

15. In a typewriting machine, in combination, a frame, a type barmovably mounted on the frame, a curved rack carried by the type bar, akey lever, a pinion sector of gradually decreasing radius connected tothe key lever, said pinion sector being adapted to engage positively thecurved rack and to give the type bar a rectilinear motion upon theoperation of the key lever, a momentum accumulator carried by the pinionsector for imparting a printing impulse to said type bar, and a springinterposed between the frame and pinion sector for returningthe parts totheir normal positions.

16. In a typewriting machine, in combination. a key lever, a pinionsector of gradually decreasing radius connected to the key ever, a typebar, means carried by the type bar adapted to cooperate with the pinionsector to give the type bar a rectilinear motion having a negativeacceleration upon the operation of the key lever, a momentum accumulatorcarriedby the pinion sector for imparting a printing impulse to the typebar, and means provided in conjunction with the pinion sector forreturning the parts to their normal positions.

17. In a typewriting machine, in combination, a movable type bar, a rackcarried by the type bar, a key lever, a pivota mounted pinion sectorconnected to the key lever and in mesh with the rack, a momentumaccun'iulator carried by the pinion sector. said pinion sector and rackbeing adaptcd to impart to the type bar along its line of motion aprinting impulse received from the momentum accumulator.

1b. In a typewriting machine, in combination, a movable type bar, a rackcarried by the type bar, a key lever, a revolvably and eccentricallymounted toothed sector connected to the key lever, said sector and rackbeing mounted, constructed and arranged so that the sector gainsmomentum under the action of gravity as it revolves in the printingmovement and co-acts with the rack to give the type bar a rectilinearmovement with a negative acceleration and to impart to the type baralong its line of movement the momentum of the sector, giving it aprinting impulse. Y

19. In. a typewriting'machine, in combination, a type bar, a rackcomprising a curved portion and a straight portion carried by the typebar, said rack being so disposed that the straight portion lies parallelto the line of movement of the type bar, a pinion sector comprising acurved portion of gradually varying radius and a straight portionextending at right angles to a radius, the curved portion of said rackand pinion sector being adapted to co-act to give the type bar anegatively accelerated printing motion and the straight portions totransmit to the type bar, along its line of movement, a printing impulseand a key lever for operating the pinion sector.

20. In a typewriting machine, in combination, a movable type bar, a rackcomprising a curved portion and a straight portion carried by the typebar, said rack being so disposed that the straight portion lies paralelto the line of movement to the type bar, a pinion sector comprisinga curved portion of gradually varying radius and a straight portionextending at right angles to a radius, a momentum accumulator carried bythe pinion sector, said curved portions of the rack and pinion sectorbeing adapted to co-act to give the type bar a printing movement with anegative acceleration and the straight portions to transmit to the typebar a printing impulse received from the momentum accumulator, and a keylever for operating the pinion sector.

In testimony whereof I aflix my signature.

GEORGE GOULD GOING.

